Sliding door



A. RUSH.

SLIDING DOOR. APPucAnoN FILED MAY 28. 19:1.

Patented Mar. 9,1920.

AlbertRush UNITED STATES PATENT oFmioE.

ALBERT RUSH, or COLUMBUS, OHIO, ASSIGNOR TO THE KINNEAR MANUFACTURINGCOMPANY, or conmvrnus, onro, A CORPORATION or cure.

SLIDING DOOR.

Specification of Letters Patent.

Patented Mar. 9, 1920.

To all whom it may concern Be it known that I, ALBERT-RUSH, a citizen ofthe United States, residing at Columbus, in the county of Franklin andState of Ohio, have invented a certain new and useful Improvement inSliding Doors, of which the following is a specification.

The object of this invention, is to provide a door, shutter or windowcomposed of several sliding sections with a single counterbalancingmeans so that either section alone or both together may be moved ineither direction.

The invention is embodied in the example herein shown and described, thefeature 7 of novelty being pointed out in the claim appended hereto. 1

In the accompanying drawing the single view illustrates in isometricperspective a pair of vertically sliding door sections equipped with'theinvention.

In the view the characters 1 and 2 designate the upper and lowersections respectively of a- Vertically sliding door. These sections workindependently in two grooves of a suitable frame 3 containing a partingstrip 4:. The two sections in the position shown in the drawing areassumed. to cover an opening in the wall of a building, said openingbeing about equal to the combined area of the sections- The uppersection 1 is furnished at its upper edge with stops 5 to be engaged bythe upper edge of the lower section when the latter section is raised sothat the two sections may thereafter be raised together when the entireopening is to be exposed.

' Mounted 7 preferably in horizontal line with the pulleys 7 and 8 whilethe'pulleys 10 and 11 flank the pulleys 7" and 8 onthe shaft. All

these pulleys are loose or turn independently of one another.

The character 12 designates a weight of" in a suitable bracket 6 abovethe left hand corners of the door sections are ample gravity to so farcounterbalance the sections as to hold them or either of them whereplaced vertically. Carried with the weight 12 at its upper end aretwoloose pulleys l3 and 1%, that designated 13 being shown as of smallerdiameter than the for- 11161.

is not necessary.

Connected with the upper left hand corners respectively of the sections1 and 2 are the opposite ends of a single chain, cord or other flexiblemember 15 which extends from those corners up around the pulleys 7 and 8and 7 and 8 vand thence down in loop form around the weight pulley 13;and connected with the upper right hand corners respectively of thesections 1 and 2 are the opposite ends of a single chain, cord or otherflexible member 16 that extends up around the pulleys 10 and 11 andthence down in loop form around the weight pulley 14. When eithersection is raised or lowered the corresponding portions of both flexiblemembers are raised or lowered and the loops around the weight pulleylengthened or shortened with respect to thepulleys above as the case maybe by the equal feeding to or withdrawal from the loop at one side onlythereby causing the weight pulleys to turn. Whenfboth the sections areraised or lowered simultaneously the loops about the weight arelengthened or shortened by feeding or withdrawal of all the flexiblemembers equally together: In this operation the weight, of coursemoveswithout any turning of the weight pulleys.

What I claim is: In combination with two parallellysliding sections, aflexible member having its ends connected with the sections, a secondfiexir ble member also having its ends connected with the sections, asingle counterbalancing. weight for the two sections, means for guid-ving the loops of the two flexible members to said single weight, andmeans on said weight to receivethe loops of saidfiexible me1nbers andpermit the independent travel of the flexible members thereunder.

ALBERT RUSH.

Such difference in diameter, however,

